@LonM Yes, for now command-line UA replacement is a working solution. But this is a temporary and inconvenient solution, which can lead to the appearance of the words "update your browser" on some sites if you forget to update the command line when new versions are released.

@LonM Yes, for now command-line UA replacement is a working solution. But this is a temporary and inconvenient solution, which can lead to the appearance of the words "update your browser" on some sites if you forget to update the command line when new versions are released.

@tadeus915 Append --user-agent="your user agent string here" to the shortcut you use to start Vivaldi. This will set the user agent for the entire browser, though, rather than for specific tabs/web panels.